latest 4-socket, 3u monolithic rack server designed for

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PowerEdge R940 Latest 4-socket, 3U monolithic rack server designed for complex workloads using highly scalable memory and network op- tions. The following documentation is designed as both an instructional aid and online reference material for the Dell EMC PowerEdge R940 rack server. The material introduces new technologies and features specific to the PowerEdge R940 in an effort to better prepare technicians to provide outstanding support to our customers. TECHNICAL

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Microsoft Word - PowerEdge-R940-Technical-Guide-AddCPUList_180912.docxPowerEdge R940
Latest 4-socket, 3U monolithic rack server designed for complex workloads using highly scalable memory and network op- tions.
The following documentation is designed as both an instructional aid and
online reference material for the Dell EMC PowerEdge R940 rack
server. The material introduces new technologies and features specific to
the PowerEdge R940 in an effort to better prepare technicians to provide
outstanding support to our customers.
TECHNICAL
Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
Copyright © 2017 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarksmaybetrademarksof theirrespectiveowners.
2017 - 06
Rev. A00
Contents 3
2 System features .......................................................................................................................... 8 Specifications ............................................................................................................................. 8
3 Chassis views and features ....................................................................................................... 10 Chassis view and features ...................................................................................................... 10
Front panel view and features ............................................................................................ 10 Back view features ............................................................................................................ 10 2.5-in x8 hard drive passive backplane .............................................................................. 11 2.5-in x24 hard drive active backplane ............................................................................... 12
Control panels, LCD and LED .................................................................................................. 12 Quick Resource Locator (QRL) ...................................................................................................... 12 Security features ................................................................................................................... 13
4 Processor ................................................................................................................................. 14 Processor Features ................................................................................................................ 14 Supported Processors ............................................................................................................ 14 Processor installation ............................................................................................................ 15 Chipset ................................................................................................................................. 15
5 Supported Memory ................................................................................................................... 17 Memory speed ...................................................................................................................... 17 Memory configurations and population rules ............................................................................. 17 Memory RAS features ............................................................................................................ 18
6 Storage .................................................................................................................................... 19 Supported hard drives ........................................................................................................... 19 RAID Controllers ................................................................................................................... 19 Internal persistent storage ..................................................................................................... 20
Lifecycle Controller 3.0 ........................................................................................................... 20 IDSDM/vflash module .......................................................................................................... 20 Boot Optimized StorageSubsystem (BOSS) ......................................................................... 20
External storage .................................................................................................................... 21 Optical drives ................................................................................................................... 21 Tape drives ....................................................................................................................... 21
7 Networking and PCIe ................................................................................................................ 22 PCIe expansion ..................................................................................................................... 22 PCIe slots .............................................................................................................................. 22
4 Contents
PCIe expansion cards ............................................................................................................ 22 PCIe slot mapping ............................................................................................................. 22
8 Power, thermal, and acoustics ................................................................................................... 24 Power, thermal and acoustics ................................................................................................. 24
Power consumption and energy efficiency ............................................................................ 24 Power supply units ................................................................................................................ 25 Thermal and acoustics ........................................................................................................... 26 Thermal design ..................................................................................................................... 26 Acoustical design .................................................................................................................. 26
9 Rack Rails ................................................................................................................................ 28 Cable Management Arm (CMA) and Strain Relief Bar (SRB) ........................................................ 28 Rack Installation .................................................................................................................... 29 Installing 14G Systems in Sliding Rails .................................................................................... 30
10 Supported operating system .................................................................................................... 31 Supported virtualization ........................................................................................................ 31
11 OpenManage systems management ......................................................................................... 32 iDRAC Lifecycle controller ...................................................................................................... 32
iDRAC features and comparison ........................................................................................ 32 Agent-free management ........................................................................................................ 37 Agent-based management ..................................................................................................... 37 OpenManage consoles .......................................................................................................... 37 OpenManage systems management tools, utilities and protocols ............................................. 38 Integration with third-party consoles ...................................................................................... 38 OpenManage connections withthird-party consoles ................................................................ 38 Server management operations ............................................................................................. 39
12 Appendix A. Additional specifications ........................................................................................ 41 Chassis dimensions ............................................................................................................... 41 Environmental specifications ..................................................................................................... 41
Particulate and gaseous contamination specifications ............................................................ 42 Standard operating temperature ........................................................................................ 43 Expanded operating temperature ...................................................................................... 44
Video specifications .................................................................................................................. 44 USB peripherals ..................................................................................................................... 45
13 Appendix B. Standards compliance .......................................................................................... 46
14 Appendix C Additional resources ............................................................................................. 47
15 Appendix D. Support and deployment services ......................................................................... 48 Server Deployment Services ................................................................................................... 48 Remote Consulting Services ................................................................................................... 48 Data Migration Service ........................................................................................................... 48
Contents 5
ProSupport Plus (for business-critical servers) ......................................................................... 49 ProSupport Enterprise Suite ................................................................................................... 49 ProSupport. ........................................................................................................................... 49 ProSupport Flex for Data Center ............................................................................................. 50 Additional professional services ............................................................................................ 50 Dell Education Services .......................................................................................................... 50 Dell Global Infrastructure Consulting Services ........................................................................ 50 Dell managed services ........................................................................................................... 51
6 System overview
System overview
The Dell EMC PowerEdge R940 is a la est 4-socket, 3U monolithic rack server designed to run complex workloads using highly scalable memory, I/O, and network options. The system features the Intel Xeon Processor Scalable family, with up to 48 DDR4 DIMMs, up to 13 PCI Express (PCIe) 3.0 enabled expansion slots, and a choice of embedded NIC technologies.
The PowerEdge R940isageneral-purpose platform capable of handling demanding workloads and applications, such as data warehouses, ecommerce, databases, and high-performance computing (HPC).
The PowerEdge R940 adds extraordin ry storage capacity options, making it well-suited for data-intensive applications that require greater storage, whilenotsacrificing I/Operformance.
New Technologies
Detailed Description
Intel Xeon Processor Scalable family Refer the Processor section for specific SKU details.
• 14nm process technology • Intel Ultra Path Interconnect (UPI) up to 3 links @ 10.4GT/s with shelf-4 • Up to 28 cores per socket with Hyper-Threading (HT) • 6x DDR4 channels@ 2666 MT/s2 DPC. 3 DPCnotsupported. • Max TDP: 165W (Note: Higher TDP skus up to 240W – UI) • Mismatched SKUs not allowed
Intel C620 Chipset Intel Platform Controller Hub (PCH) with Intel Node Manager 4.0 ME
2666 MT/s DDR4 Memory Select SKUs of the Intel Xeon Skylake Scalable family processors support 2666 MT/s memory. The R940 supports two DIMMs per channel max at 2666 MT/s with these processors. See the Memory section for additional speed/population details.
• 6x DDR4 Channels per socket, 2 DIMMs per channel (2DPC) • Up to 2666 MT/smax(CPU sku and DIMM-dependent)
System overview 7
Technology Detailed Description
variety of Mobile OS’s with higher data throughput, the Quick Sync 2.0 version replaces NFC technology.
8 System features
Processor sockets 2 socket or 4 sockets
Internal interconnect Intel Ultra Path Interconnect (UPI) up to 10.4 GT/s
Chipset Intel C620
Memory • Up to 6 TB-48 DIMM slots • RDIMM-up to 32 GB • LRDIMM-up to 64 GB and 128 GB
PCIe slots Maximum 13 PCIe slots (three x8 slots and ten x16 slots)
RAID controller • H330+
• H740P • H840 • 12 Gb SAS HBA • Software RAID: S140 • Hardware RAID: M.2 SATAadapter (BOSS)
Drives • 2.5-in, 12 GB SAS and 6 GB SATA
• 8 harddriveson passivebackplane • 24 hard drives on active backplane with up to 12 PCIe NVMe hard drive capable universal slots.
Maximum internal storage
• Upto 122 TBsusing 12x2.5-in 3.84 TBSAS/SATA/SSD/NVMe+ 12x2.5-in 6.4TBNVMe PCIe SSD's.
Embedded NIC • Flexible Rack Network Daughter Cards (rNDC). • PCIe Gen 3 x8
Power supply • Platinum AC supported power supplies: 1100 W, 1600 W, and 2000 W, 2400 W
• DC supported power supply: 1100 W
Availability • RDIMM, LRDIMM • Hot-plug hard drives, redundant cooling fans, and power supply • Internal Dual SD Module (IDSDM) • Boot Optimized Storage Subsystem(BOSS) via M.2
System features 9
• OpenManage • QuickSync2.0 • OMPC3 • Digital License Key • iDRACDirect (dedicated micro-USB port) • Easy Restore • vFlash
Operating systems • RedHat Enterprise Linux 6.9 Server x86_64
• RedHat Enterprise Linux 7.3 Server x86_64 • Novell SuSE Linux Enterprise Server 11 (with PLDP) SP4x86_64 • Novell SuSE Linux Enterprise Server 12 SP2 x86_64 • MS, Windows Server 2016 • MS, Windows Server 2012 R2
For more information on the specific versions and additions, visit Dell.com/OSsupport.
10 Chassis views and features
3
Chassis view and features
Front panel view and features The following components are located on the front of the PowerEdge R940:
Figure 1. PowerEdge R940 front panel
1 Leftcontrolpanel
3 iDRAC Quick Sync 2 wireless indicator
4 Hard drives
9 Information tag
For more information on the HDD numbering, see the Dell PowerEdge R940 Hardware Owner's Manual on www.dell.com/support
Back view features The following components are located on the back of the PowerEdge R940:
Chassis views and features 11
Figure 2. PowerEdge R940 back view
1 Half-height PCIe expansion card slot
2 Full-height PCIe expansion slots
3 Ethernet connector (4)
5 Power supply unit (2)
6 Video port
7 Serial port
11 Status indicator cable port
2.5-in x8 hard drive passive backplane This passive backplane allows 8x2.5-in SAS/SATA hard drives to be connected to the backplane. As a passive backplane, it does not support the flexible assignment of hard drives to nodes. Each node in the chassis gets equal number of total available hard drives.
Figure 3. Hard drive backplane 2.5-in x8
12 Chassis views and features
1 SAS connector (J_SAS_B)
2 SAS connector (J_SAS_A)
3 Power connector (J_BP_PWR)
4 Signal connector (J_BP_SIG)
1 PCIe connector (J_PCIE_B2)
2 PCIe connector (J_PCIE_A2)
3 PCIe connector (J_PCIE_B1)
4 PCIe connector (J_PCIE_A1)
6 PCIe connector (J_PCIE_A0)
7 PCIe connector (J_BP_PWR_A)
8 Signal connector (J_BP_SIG)
9 PCIe connector (J_BP_PWR_B)
Control panels, LCD and LED For more information about the PowerEdge R940 control panels, see the PowerEdge R940's Owner’s Manual at Dell.com/Support/ Manuals.
Quick Resource Locator (QRL) The Embedded Service Tag (EST) this generation will contain the Service Tag number and the iDRAC password. Embedding the Service Tag and iDRAC password in the QRL allows the mobile application to display information on their configuration, warranty status, specific  iDRAC password and service level agreement. Additionally, the EST will allow us to understand how our customers are using QRL.
The following image shows the service tag QRL label:
Chassis views and features 13
Figure 5. Service tag QRL label
The QRL ESTlabel hasaservicetag embeddedintothe QR code that the QRL website uses to look up system infointhe servicetag data base. From that database the QRL website pulls warranty info and factory configuration details. After viewing this, the customer can move on to the product page.
The following image shows the chassis QRL label:
Figure 6. Chassis QRL label
Security features The latest generation of PowerEdge servers has the features listed in the table to help ensure the security of your data center.
Table 3. Security features
Securityfeature Description
Cover latch A tooled latch is integrated in the top cover to secure it to the rack chassis.
TPM The Trusted Platform Module (TPM) is used to generate/store keys, protect/authenticate passwords, and create/storedigital certificates. TPM 1.2 issupported.
Poweroff security BIOS has the ability to disable the power button function.
14 Processor
Processor Features
4
Processor
The Intel Xeon Skylake Scalable family is the next generation core architecture with improved Instructions per Cycle (IPC) and other architectural improvements. The Intel Xeon Skylake Scalablefamilyfeaturesareasfollows:
• Virtual address space of 48 bits and a physical address space of 46 bits. • Intel Hyper-Threading Technology (Intel® HT Technology) when enabled allow each core to support two threads. • First Level Cache (FLC) 64 KB total. The FLC is comprised of a 32 KB ICU (Instruction Cache) and 32 KB DCU (Data Cache). • MB Mid-LevelCache (MLC)percore (non-inclusive with the LLC). • Intel® Advanced Vector Extensions 512 (Intel® AVX-512) with a single AVX512 fused multiply add (FMA) execution units. SKUs which
support Advanced RAS enable a 2nd FMA execution unit.
Supported Processors
Processor levels
Features
81xx-Platinum • 2S-2UPI, 2S-3UPI, 4S-2UPI, 4S-3UPI, and 8S-3UPI capability • 6-ch DDR4 @ 2666 • 3 UPI links @ 10.4GT/s • Intel® Turbo Boost • Intel® Hyper-Threading • Intel® AVX-512 (2 512-bit FMAs) • 48 lanes PCIeGen3 • Node Controller Support • Advanced RAS
61xx-Gold • 2S-2UPI, 2S-3UPI, 4S-2UPI, and 4S-3UPI capability
Processor 15
Table 5. Feature comparison table
Feature 81xx-Platinum 61xx-Gold 51xx-Gold
UPI speed 10.4 GT/s 10.4 GT/s 10.4 GT/s
Supported topologies 3 UPI: 2S-2UPI,2S-3UPI, 4S-2UPI, 4S-3UPI, 8S-3UPI
3 UPI: 2S-2UPI,2S-3UPI, 4S-2UPI, 4S-3UPI
2S-2UPI,4S-2UPI
Number of memory channels
DDR4 speed 2666 2666 2400
Memory capacity 768 GB, 1.5 TB-SKUs: 8180, 8176, 8170, and 8160
768 GB, 1.5 TB-SKUs: 6140, 6134, and 6142
768 GB
Processor installation For processor installation instructions, see the Dell PowerEdge R940 Hardware Owner's Manual
Chipset The Intel C620 PCH provides extensive I/O support. Functions and capabilities include:
• ACPI Power Management Logic Support, Revision 4.0a
• PCI Express* Base Specification Revision 3.0
• Integrated Serial ATA host controller, supports data transfer rates of up to 6 Gb/s on all ports.
• xHCIUSBcontrollerwith SuperSpeed USB 3.0ports
• General Purpose Input Output (GPIO)
• Low Pin Count interface, interrupt controller, and timer functions
• System Management Bus Specification, Version 2.0
• Integrated Clock Controller/ Real Time Clock Controller
• Intel® High Definition Audio and Intel® Smart Sound Technology
• Integrated 10/1 Gb Ethernet
• Supports Intel Rapid Storage Technology Enterprise
• Supports Intel Active Management Technology and Server Platform Services
• Supports Intel Virtualization Technology for Directed I/O
• Supports Intel Trusted Execution Technology
16 Processor
Supported Memory 17
5
Supported Memory The PowerEdge R940 supportsupto 48 DIMM slots, withupto 6 TBofmemoryand speedsupto 2666 MT/s. Supported DIMMsare registered (RDIMMs) and load reduced (LRDIMMs) DIMMs which uses a buffer  to reduce memory loading and provide greater density allowing maximum memory capacity.
Memory speed The PowerEdge R940 supports memory speeds of 2666 MT/s, 2400 MT/s, and 1866 MT/s depending on the DIMM types installed and configured. All memory on all of the processors and channels run at the same speed and voltage. The operating speed of the memory is determined by the maximum speed supported by the processor, the speed settings in BIOS, and the operating voltage of the system.
Table 6. Memory configuration based on quantity and quality of DIMM
DIMM type DIMM ranking Capacity DIMM rated voltage and speed
Max speed (MT/s)on 1 DPC
Max speed (MT/s)on 2 DPC
RDIMM 1R/2R 8 GB, 16 GB, 32 GB DDR4 (1.2 V), 2666 MT/s
LRDIMM 4R/8R 64 GB, 128 GB DDR4 (1.2 V), 2666 MT/s
2666 2666
2666 2666
Memory configurations and population rules The R940 supports flexible memory configurations ranging from 8 GB (minimum) to 128 GB (maximum). The R940 supports up to 12 DIMMsperprocessoror 24 DIMMsinadual-processorand 48 DIMMsinaquad-processorconfiguration. Each R940 has 6 memory channels per processor, with each channel supporting up to 2 DIMMs.
The R940 server support flexible memory configuration according to the following population rules:
• If DIMMs of different speeds are mixed, all channels across all processors operate at the slowest DIMM's common frequency.
• DIMM type:
• All DIMMs must be DDR4 RDIMM and LRDIMM
• Only one type of DIMM is allowed per system-RDIMM, or LRDIMM. They cannot be mixed.
• DIMMswithdifferentdatawidth(x4 andx8 datawidth) canbemixed.
• Thelargest DIMMcapacityisplaced first (slot A1first, then A2 andsoon). Thesecond CPUmirrorsthe first CPUpopulationrule.
• Maximum of two different capacity DIMMs are allowed in the system.
• Maximum of two different rank DIMMs are allowed in the system.
Table 7. DIMM mixing support
DIMM types RDIMM LRDIMM 3DS LRDIMM
RDIMM allowed not allowed not allowed
LRDIMM not allowed allowed not allowed
3DS LRDIMM not allowed not allowed allowed
18 Supported Memory
Memory RAS features Reliability, Availability, and Serviceability (RAS) features help keep the system online and operational without significant impact to performance, and decreases data loss and crashing issues. RAS helps in rapid and accurate diagnosis ofsystem faults.
Table 8. Supported RAS features
Feature Description
Dense configuration optimized profile  Increased memory reliability can be a result from this selectable platform profile that adjusts parametersto reduce faults regarding refresh rates, speed, temperature and voltage.
Memory demand and patrol scrubbing Demand scrubbing is the ability to write corrected data back to the memory once a correctable error is detected on a read transaction. Patrol scrubbing proactively searches the system memory, repairing correctable errors.
Recovery from single DRAM device failure (SDDC) Recovery from Single DRAM Device Failure (SDDC) provides error checking and correction that protects against any single memory chip failure as well as multi- bit errors from any portion of a single memory chip.
Failed DIMM isolation This feature provides the ability to identify a specific failing DIMM channel pair, thereby enabling the user to replace only the failed DIMM pair.
Memory mirroring Memory mirroring is a method of keeping a duplicate (secondary or mirrored) copy of the contents of memory as a redundant backup for use if the primary intra-socket memory fails. The mirrored copy of the memory is stored in memory of the same processor socket.
Memory address parity protection This feature provides the ability to detect transient errors on the address lines of the DDR channel.
Memory sparing (rank) Memorysparingallocatesone rank per channel as aspare. If excessive correctable errors occur in a rank or channel, they are moved to the spare area while the operating system is running to prevent the errors from causing an uncorrectable failure.
Memory thermal throttling This feature helpsto optimize power/performance and can also be used to prevent DIMMs from overheating.
Storage 19
Topics:
1920GB, 3200GB, 3840GB,
3200GB, 3840GB, 7680GB,
RAID Controllers The PowerEdge R940 supports full height PERC adapter form factor only in slot 1 (for primary) and slot 6 (for secondary), and does not support mini PERCformfactors. The PERCcontroller offeringsfor R940 willbea heavy leverageofthe 13GPERCfamily. New to the
Form factor Type Speed Rotational speed Capacities
2.5-inch • SATA 6 GB
7680GB, 960GB(SED FIPS), 1920GB(SED FIPS)
2.5-inch • SATA 6 GB 7.2 K 1TB, 2TB
2.5-inch • SAS 12 GB 7.2 K 1TB, 2TB, 2TB(SED FIPS)
2.5-inch • SAS 12 GB
15360GB, 1600GB(SED FIPS), 1920GB(SED FIPS), 3200GB(SED FIPS), 3840GB(SED FIPS)
2.5-inch SAS 12 GB 10 K 600GB, 1.2TB, 1.8TB, 2.4TB, 1.2TB(SED FIPS), 2.4TB
(SED FIPS)
2.5-inch SAS 12 GB 15 K 300GB, 600GB, 900GB, 900GB (SED FIPS)
20 Storage
R940 PERC controller is the Harpoon-based Premium Performance tier offering. This high-end offering will drive IOPs performance and enhanced SSD performance.
Table 10. PERC series offerings
Performance level Controller and description
Entry S140 (NVMe, M.2 SATA) SW RAID SATA
Value H330+, 12Gb SAS HBA (External) Fury IOC Memory: None
x8 12 Gb SAS
x8 PCIe 3.0
Premium performance H740P, H840 Harpoon 8x8 ROC Memory: 4/8GB, NV 72-bit
Internal persistent storage The PowerEdge R940 offers two internal persistent storage:
• Lifecycle Controller 3.0
LifecycleController3.0 For more information on Lifecycle Controller 3.0, visit Dell Lifecycle Controller integration for configuration manager.
IDSDM/vflash module This module contains the Internal Dual SD Module (IDSDM) and vflash card that are combined into a single card module. There are two SKUs available:
• vflash
The IDSDM withvflashmodulehas adedicatedslotatthebackofthe system chassis. Thisis a Dell-proprietary PCIex1 slotthat usesa USB 3.0 interface to host. In the system, the IDSDM and vflash card size changes from SD to microSD and the supported capacity for IDSDMmicroSDcardsare 16 GB, 32 GB, or 64 GB, whileforvflashthecapacityis 16 GBonly. Thewrite-protectswitchisbuiltonboardthe IDSDM/vflash module.
Boot Optimized Storage Subsystem (BOSS) BOSS is offered as a means of booting 14G servers to a full OS in the following scenarios:
• A solution such as IDSDM may be desired, but the target OS is a full OS (not just hypervisor).
Storage 21
• The user does not to trade off the standard hot-plug hard drive slot for OS install.
BOSS is a PCIe card in the front to support up to two 80mm or 110mm M.2 SATA or PCIe x1 devices.
NOTE: The portfolio solution using a PCIe carrier card is not supported on R940.
NOTE: BOSS drives and daughter card are not hot-plug capable.
External storage
Device type Description
NAS/IDM appliance software Supports NAS software stack
JBOD Supports connection to 12Gb MD-series JBODs
Optical drives The R940 does not support internal optical drives. However, external USB optical drives will be supported.
Tape drives The R940 does not support internal tape drives. However, external tape backup devices will be supported. Below is a list of supported external tape drives:
• External RD1000 USB
• External LTO-5, LTO-6, and LTO-76 Gb SAS tape drives
• 114X rack mount chassis with LTO-5, LTO-6, and LTO-7 6 Gb SAS tape drives
• TL1000 with LTO-5, LTO-6, and LTO-76 Gb SAS tape drives
• TL2000 with LTO-5, LTO-6, and LTO-76 Gb SAS and 8Gb FC tape drives
• TL4000 with LTO-5, LTO-6, and LTO-76 Gb SAS and 8Gb FC tape drives
• ML6000 with LTO-5, LTO-6, and LTO-7 6 Gb SAS and 8Gb FC tape drives
22 Networking and PCIe
PCIe expansion Forinformation oncardinstallation, requirements, andslotpriorities, seethe PowerEdge R940 Owner's Manual on Dell.com/Support/ Manuals.
PCIe slots Systems with 2 socket processors (without Processor Expansion Module) supports up to 7 PCIe Gen3 expansion slots. Systems with 4 socket processors (with Processor Expansion Module) supports up to 13 PCIe Gen3 expansion slots.
PCIe expansion cards
Physical location Slot number
Form factor Controlling CPU
Power Length
Baseboard 1 Full height CPU1 PCIe GEN3 x8 (x16 connector) 25 W half length
Baseboard 2 Full height CPU1 PCIe GEN3 x16 (x16 connector) 75 W half length
Baseboard 3 Full height CPU1 PCIe GEN3 x16 (x16 connector) 75 W half length
Baseboard 4 Full height CPU2 PCIe GEN3 x16 (x16 connector) 75 W half length
Baseboard 5 Full height CPU2 PCIe GEN3 x8 (x16 connector) 25 W half length
Baseboard 6 Full height CPU2 PCIe GEN3 x8 (x16 connector) 25 W half length
Baseboard 7 Full height CPU2 PCIe GEN3 x16 (x16 connector) 75 W half length
Riser 1 on PEM for 4 socket configuration 
8 Full height CPU3 PCIe GEN3 x16 (x16 connector) 75 W 10.5" (~3/4 length)
Riser 1 on PEM for 4 socket configuration 
9 Full height CPU3 PCIe GEN3 x16 (x16 connector) 25 W half length
Riser 1 on PEM for 4 socket configuration 
10 Full height CPU3 PCIe GEN3 x16 (x16 connector) 25 W half length
Networking and PCIe 23
Physical location Slot number
Form factor Controlling CPU
Power Length
Riser 2 on PEMfor 4 socket
11 Full height CPU4 PCIe GEN3 x16 (x16 connector) 75 W 10.5" (~3/4 length)
configuration  Riser 2 on PEMfor 4 socket
12 Full height CPU4 PCIe GEN3 x16 (x16 connector) 25 W half length
configuration  Riser 2 on PEMfor 4 socket
13 Full height CPU4 PCIe GEN3 x16 (x16 connector) 25 W half length
configuration 
8
Power, thermal and acoustics PowerEdge servers have an extensive collection of sensors that automatically track thermal activity, which helps regulate temperature thereby reducing server noise and power consumption.
Power consumption and energy efficiency
Table 13. Power tools and technologies
Feature Description
Power supply units (PSU) portfolio Dell’s PSU portfolio includes intelligent features such as dynamically optimizing efficiency while maintaining availability and redundancy. Find additional information in the Power supply units section.
Tools for right-sizing Energy Smart Solution Advisor (ESSA) is a tool that can help you determine the most efficient configuration possible. With Dell’s ESSA, you can calculate the power consumption of your hardware, power infrastructure, and storage.
ESSA can help you determine exactly how much power your server will use at a given workload, and the PSU Advisor can help you choosethebest, mostefficient PSUforyourworkload.
Learn more at Dell.com/calc.
Energy Smart Data Center Assessmentisa Dell Services offering  that uses infrastructure and thermal analysis to help maximize system efficiency. Learn more at Dell.com/EnergySmart.
Industry compliance Dell’s servers are compliant with all relevant industry certifications 
and guidelines, including 80 PLUS, Climate Savers, and ENERGY STAR.
Power monitoring accuracy PSU power monitoring improvements include:
• Dell’s power monitoring accuracy is currently 1%, whereas the industry standard is 5%
• More accurate reporting of power • Better performance under a power cap
Power capping Use Dell’s systems management to set the power cap limit for your systems to limit the output of a PSU and reduce system power consumption. Dellisthe first hardwarevendortoleverage Intel Node Manager for circuit- breaker fast capping.
Power, thermal, and acoustics 25
Feature Description
Systems management iDRAC9 Enterprise provides server- level management that monitors, reports, and controls power consumption at the processor, memory, and system level.
Dell OpenManage Power Center delivers group power management at the rack, row, and data center level for servers, power distribution units, and uninterruptible power supplies.
Active power management Intel Node Manager is an embedded technology that provides
individual server-level power reporting and power limiting functionality. Dell offers a complete power management solution comprised of Intel Node Manager accessed through Dell iDRAC9 Enterpriseand OpenManage Power Centerthatallowspolicy- based management of power and thermal at the individual server, rack, and data center level.
Hot spare reduces power consumption of redundant power supplies.
Thermal control of fan speed optimizes the thermal settings for your environment to reduce fan consumption and lower system power consumption.
Idle power enables Dell servers to run as efficiently when idle as whenatfullworkload.
Fresh Air cooling FAC is supported with certain configuration limitations. With the
thermal design and reliability of Dell products, you can have the capabilitytooperateatexcursion- basedtemperaturesbeyondthe industry standard of 35°C (95°F) without impacting your availability model. This solution takes into account servers, networking, storage, and other infrastructure.
Rack infrastructure Dellofferssomeoftheindustry’shighest- efficiencypower infrastructuresolutions, including:
• Power Distribution Units(PDUs) • Uninterruptible Power Supplies (UPSs) • Energy Smartcontainmentrack enclosures
Power supply units Energy Smartpowersupplies haveintelligentfeatures, such asthe ability todynamicallyoptimizeefficiency whilemaintainingavailabilityand redundancy. Alsofeaturedareenhancedpower-consumptionreductiontechnologies, suchashighefficiencypowerconversionand advanced thermal-management techniques, and embedded power-management features, including high-accuracy power monitoring.
The following power supply unit options are available for the R940:
• 1100W, 1100W DC
• 2400W (UI)
The PowerEdge R940 supports up to 2 AC or DC power supplies with 1+1 redundancy, auto sensing, and auto-switching capability.
26 Power, thermal, and acoustics
Table 14. Power supply efficiency levels
Power supply output Class 10% 20% 50% 100%
1100W AC Platinum 89.00% 93.00% 94.50% 92.00%
1100W DC Platinum 80.00% 88.00% 91.00% 88.00%
1600W AC Platinum 87.00% 90.00% 94.00% 91.00%
2000W AC Platinum 89.00% 93.00% 94.00% 91.00%
Thermal and acoustics Thermal management of PowerEdge R940 delivers high performance for the right amount of cooling to components at the lowest fan speedsacrossawiderangeofambienttemperaturesfrom 10°Cto 35°C(50°Fto 95°F) andtoextendedambienttemperatureranges (see Environmental Specifications) . The benefits to you are lower fan power consumption (lower server system power and data center power consumption) and greater acoustical versatility. The PowerEdge R940 is quiet enough to be used in an office environment in typical and minimum configurations. 
Thermal design The thermal design of the PowerEdge R940 reflects the following:
• Optimized thermal design: The system layout is architected for optimum thermal design.
• System component placement and layout are designed to provide maximum airflow coverage to critical components with minimum expense of fan power.
• Comprehensive thermal management: The thermal control system regulates the fan speed based on several different responses from all system- component temperature sensors, as well as inventory for system configurations. Temperature monitoring includes components such as processors, DIMMs, chipset, the inlet air ambient, hard disk drives, NDC, and GPU.
• Open and closed loop thermal fan speed control: Open loop thermal control uses system configuration to determine fan speed based on inlet air ambient temperature. Closed loop thermal control method uses feedback temperatures to dynamically determine proper fan speeds.
• Userconfigurablesettings: Withtheunderstandingandrealizationthateverycustomerhasuniquesetofcircumstancesor expectations from the system, in this generation of servers, we have introduced limited user- configurable settings residing in the iDRAC9 BIOS setup screen. For more information, see the PowerEdge R940 Owner’s Manual on Dell support.
• Coolingredundancy: The R940 allow N+1fanredundancy, allowingcontinuousoperationwithonefanfailureinthesystem.
Acoustical design The acoustical design of the PowerEdge R940 reflects the following:
• Versatility: The R940 saves power draw in the data center but are also quiet enough for office environment in typical and minimum configurations.    Youmay findthatthesystemissufficiently   quietwherethesounditemitsblendsintotheenvironment.
• Adherence to Dell’s high sound quality standards: Sound quality is different from sound power level and sound pressure level in that it describeshowhumansrespondtoannoyancesinsound, likewhistlesandhums. Oneofthesoundqualitymetricsinthe Dell specificationisprominenceratioofatone.
• Noiserampanddescentatboot-upfrompoweroff: Fanspeedsandnoiselevelsrampduringthebootprocess(frompower- offto power- on) in order to add a layer of protection for component cooling in the event that the system were not to boot properly. In order to keep the boot-up process as quiet as possible, the fan speed reached during boot-up is limited to about half of full speed.
• Noise level dependencies: If acoustics is important to you, several configuration choices and settings are important to consider:
• For lower acoustical output, use a small number of lower rotational- speed SATA hard drives, nearline SAS hard drives, or non- rotational devices like SSDs. 15k hard drives generate more acoustic noise than that of lower rotational- speed hard drives, and noiseincreaseswithnumberofharddrives.
• Fan speeds and noise may increase from baseline factory configurations if certain profiles are changed by the user or the system configurations are updated. The following is a list of items that impact fan speeds and acoustical output:
Power, thermal, and acoustics 27
• iDRAC9 BIOS settings: Performance Per Watt (DAPC or OS) may be quieter than Performance or Dense Configuration (iDRAC Settings > Thermal > Max. Exhaust Temperature or Fan speed offset). 
• The quantity and type of PCIe cards installed: This affects overall system acoustics. Installation of more than two PCIe cards results in an increase in overall system acoustics.
• PCIe controller-based SSD drives: Drives such as Express flash drives and Fusion- IO cards require greater airflow for cooling, and result in significantly higher noise levels.
• Systems with an H330 PERC: This configuration may be quieter than those with an H730P PERC with battery backup. However, higher noise levels result when a system is configured as non-RAID.
• Hot spare feature of power supply unit: In the system default setting, the Hot Spare Feature is disabled; acoustical output from the power supplies is lowest in this setting.
28 Rack Rails
Rack Rails The rail offerings consist of sliding rails only.
The sliding rails allow the system to be fully extended out of the rack for service. There is also an optional Cable Management Arm (CMA) and optional Strain Relief Bar (SRB).
Figure 7. Sliding rails with optional CMA and optional SRB
One key factor in selecting the proper rails is identifying the type of rack in which they will be installed. Both the sliding rails and the static rails support tool-less mounting in 19”-wide, EIA-310-E-compliant square hole and unthreaded round hole 4-post racks. Both alsosupport tooled mounting in threaded hole 4-post racks, but only the static rails, as the more universal solution, support mounting in 2-post (Telco) racks.
Table 15. Sliding rail
Square Round Threaded
min max min max min max Without CMA With With SRB or SRB CMA
R940 B12 Sliding ReadyRails II 600 894 586 887 600 909 773 926 877
NOTE: Screws are not included in either kit due to the fact that threaded racks are offered with a variety of thread designations. Usersmustthereforeprovidetheirownscrewswhenmountingtherailsinthreadedracks.
NOTE: Screw head diameter for the sliding rails must be 10 mm or less.
Cable Management Arm (CMA) and Strain Relief Bar (SRB) The optional cable management arm (CMA) and Strain Relief Bar (SRB) organizes and secures the cords and cables exiting the back of the server. The CMA supports up to medium size cable loads and unfolds to allow the server to extend out of the rack without having to
Rack Rails 29
detach the cables. The SRB is a bar that supports large cable loads and also allows the server to extend out of the rack without having to detach the cables if cable service loops are created.
Some key features of the CMA include:
• Large U-shaped baskets to support dense cable loads
• Open vent pattern for optimal airflow
• Ability to be mounted on either side by simply swinging the spring-loaded brackets from one side to the other
• Utilizes hook-and-loopstraps rather than plastic tie wraps to eliminate the risk of cable damage during cycling
• Includes a lowprofile fixed tray to both support and retain the CMA in its fully closed position
• Both the CMA and the tray mount without the use of tools via simple and intuitive snap-in designs
Some key features of the SRB include:
• Sturdy bar that supports large cable loads.
• Controls stresses on connectors.
• Utilizes hook-and-loopstraps rather than plastic tie wraps to make securing cables quick and eliminates the risk of cable damage.
• Cables can be segregated into discrete, purpose specific bundles.
• Attaches to the rails without the use of tools via simple and intuitive latching design.
The CMA can be mounted to either side of the sliding rails without the use of tools or the need for conversion. However, it is recommended that it be mounted on the side opposite to the power supplies to allow easier access to the power supplies and rear hard drives (if applicable) for service or replacement.
Rack Installation The sliding rails are a "drop-in" design. This means that the system is installed vertically into the rails by inserting the standoffs on the sides of the system into the "J-slots" in the inner rail members with the rails in the fully extended position. As with all 2U systems, a minimum of twopeoplearerequiredinorder toproperlyinstallthesystemin therails.
30 Rack Rails
NOTE: The 2U system requires two people for installation due to its heavier weight.
Installing 14G Systems in Sliding Rails To install the 14G system in sliding rails:
1 Pull the inner slide rails out of the rack until they lock into place.
• Hold the system by its front and back ends and tilt the front end upward slightly.
• Checkthewindowonthesidesofbothrailstoconfirmthattheheadsofthestandoffs arevisiblebeforeadjustingorreleasing your grip on the back end of the system.
• Use your free hand to hold the rail against the side of the chassis if needed as the system is rotated downward into the remaining J-slots.
2 Locate the rear rail standoff on each side of the system and lower them into the rear J-slots of the slide assembly.
3 Rotatethesystemdownwarduntilalltherailstandoffsareseatedinthe J-slots.
4 Push the system inward until the lock levers click into place. Press the slide-release lock buttons on both rails and slide the system into the rack.
Supported operating system 31
RedHat Enterprise Linux 6.9 Server x86_64 VM93R
RedHat Enterprise Linux 7.3 Server x86_64 V9RKV
Novell SuSE Linux Enterprise Server 11 (with PLDP) SP4 x86_64 YN80M
Novell SuSE Linux Enterprise Server 12 SP2 x86_64 CM3M5
MS, Windows Server 2016 XW2CG
MS, Windows Server 2012 R2 Y1V44
Ubuntu LTS 14.04 N/A
VMware vSphere 2016 U1-N version ESXi
VMware vSphere v6.0 U3-N-1 version ESXi
Citrix Xen Server 7.1.x N/A
32 OpenManage systems management
• Integration with third-party consoles
iDRAC Lifecycle controller The PowerEdgeserverprovidesstorageexpandabilitythatallowsyoutoadapttoyourworkloadandoperationaldemands. With comprehensive storage options, the server offer various drive types, internal and external storage controllers, and different backplanes for varied number of drives. The microcontroller is responsible for acting as an interface or gateway between the host system (i.e., server management software) and the peripheral devices. These peripheral devices, which may or may not be Intelligent Platform Management Interface (IPMI) compliant, consist of the power supplies, the storage backplane, integrated storage controllers, control panel with semi- intelligent display, and Lifecycle Controller.
iDRAC features and comparison iDRAC9 is available in basic, express, and enterprise options.
Table 18. iDRAC feature comparison
Features iDRAC8 Basic
IPMI 2.0 Yes Yes Yes Yes Yes Yes Yes Yes
DCMI 1.5 Yes Yes Yes Yes Yes Yes Yes Yes
Web-based GUI—HTML5 Yes Yes Yes Yes Yes Yes Yes Yes
Racadm command line— local/remote
OpenManage systems management 33
SMASH-CLP—SSH-only Yes Yes Yes Yes Yes Yes Yes Yes
Telnet Yes Yes Yes Yes Yes Yes Yes Yes
SSH Yes Yes Yes Yes Yes Yes Yes Yes
Serial redirection Yes Yes Yes Yes Yes Yes Yes Yes
WSMAN Yes Yes Yes Yes Yes Yes Yes Yes
Network Time Protocol No Yes Yes Yes Yes Yes Yes
Connectivity
Shared NIC Yes Yes Yes Yes N/A N/A Yes Yes
Dedicated NIC Yes Yes Yes Yes Yes Yes Yes Yes
VLAN tagging Yes Yes Yes Yes Yes Yes Yes Yes
IPv4 Yes Yes Yes Yes Yes Yes Yes Yes
IPv6 Yes Yes Yes Yes Yes Yes Yes Yes
DHCP(newdefault; no Yes Yes Yes Yes Yes Yes Yes Yes static IP)
DHCP with Zero Touch No No No No No No No Yes
Dynamic DNS Yes Yes Yes Yes Yes Yes Yes Yes
OS pass-through Yes Yes Yes Yes Yes Yes Yes Yes
iDRAC Direct-Front panel Yes Yes Yes Yes Yes Yes Yes Yes USB
Connection View No Yes No Yes No Yes No Yes
NFS v4 No Yes No Yes No Yes No Yes
SMB3.0 with NTLM v1 and No Yes No Yes No Yes No Yes NTLM v2
Security
Role-based authority Yes Yes Yes Yes Yes Yes Yes Yes
Local users Yes Yes Yes Yes Yes Yes Yes Yes
SSL encryption Yes Yes Yes Yes Yes Yes Yes Yes
IP blocking No No Yes Yes Yes Yes Yes Yes
Directory services—AD, No No No No No No Yes Yes LDAP
2-factor authentication No No No No No No Yes Yes
Single sign-on No No No No No No Yes Yes
PK authentication No No Yes Yes Yes Yes Yes Yes
FIPS 140-2 Yes Yes Yes Yes Yes Yes Yes Yes
Secure UEFI bootcertificate  management
No Yes No Yes No Yes No Yes
34 OpenManage systems management
Unique iDRAC default password
Customizable Security Policy Banner-login page
No Yes No Yes No Yes No Yes
Quick Sync 2.0-optional auth for read operations
No Yes No Yes No Yes No Yes
Quick Sync 2.0-add mobile device number to LCL
No Yes No Yes No Yes No Yes
Remote Presence
Power control Yes Yes Yes Yes Yes Yes Yes Yes
Boot control Yes Yes Yes Yes Yes Yes Yes Yes
Serial-over-LAN Yes Yes Yes Yes Yes Yes Yes Yes
Virtual Media No No No No Yes Yes Yes Yes
Virtual Folders No No No No No No Yes Yes
Remote File Share No No No No No No Yes Yes
Virtual Console No No No No Yes Yes Yes Yes
HTML5 access to virtual console
No No No No Yes Yes Yes Yes
VNC connection to OS No No No No No No Yes Yes
Quality/bandwidth control No No No No No No Yes Yes
Virtual Console collaboration —6 users
No No No No No No Yes Yes
Virtual Console chat No No No No No No Yes Yes
Virtual Flash partitions No No No No No No Yes Yes
Group manager No No No No No No No Yes
HTTP/HTTPS support along with HFS/CIFS
No Yes No Yes No Yes No Yes
Power and Thermal
Real-time power meter Yes Yes Yes Yes Yes Yes Yes Yes
Power thresholds & alerts No No Yes Yes Yes Yes Yes Yes
Real-time power graphing No No Yes Yes Yes Yes Yes Yes
Historical power counters No No Yes Yes Yes Yes Yes Yes
Power capping No No No No No No Yes Yes
Power Center integration No No No No No No Yes Yes
Temperature monitoring Yes Yes Yes Yes Yes Yes Yes Yes
Temperature graphing No No Yes Yes Yes Yes Yes Yes
OpenManage systems management 35
iDRAC8 Enterprise
iDRAC9 Enterprise
Health Monitoring
Full agent-free monitoring Yes Yes Yes Yes Yes Yes Yes Yes
Predictive failure monitoring Yes Yes Yes Yes Yes Yes Yes Yes
SNMPv1, v2 andv3—traps Yes Yes Yes Yes Yes Yes Yes Yes and gets
Email alerting No No Yes Yes Yes Yes Yes Yes
Configurable thresholds Yes Yes Yes Yes Yes Yes Yes Yes
Fan monitoring Yes Yes Yes Yes Yes Yes Yes Yes
Power Supply monitoring Yes Yes Yes Yes Yes Yes Yes Yes
Memory monitoring Yes Yes Yes Yes Yes Yes Yes Yes
CPU monitoring Yes Yes Yes Yes Yes Yes Yes Yes
RAID monitoring Yes Yes Yes Yes Yes Yes Yes Yes
NIC monitoring Yes Yes Yes Yes Yes Yes Yes Yes
HD monitoring—enclosure Yes Yes Yes Yes Yes Yes Yes Yes
Out of Band Performance No No No No No No Yes Yes Monitoring
Alerts for excessive SSD No Yes No Yes No Yes No Yes wear
Customizable settings for No Yes No Yes No Yes No Yes Exhaust Temperature
Update
Remote agent-free update Yes Yes Yes Yes Yes Yes Yes Yes
Embedded update tools Yes Yes Yes Yes Yes Yes Yes Yes
Sync with repository— No No No No No No Yes Yes scheduled updates
Auto update No No No No No No Yes Yes
Improved PSU firmware 
Deployment and Configuration 
Local configuration via F10 Yes Yes Yes Yes Yes Yes Yes Yes
Embedded OS deployment Yes Yes Yes Yes Yes Yes Yes Yes tools
Embedded configuration  tools
AutoDiscovery No No Yes Yes Yes Yes Yes Yes
Remote OS deployment No No Yes Yes Yes Yes Yes Yes
Embedded driver pack Yes Yes Yes Yes Yes Yes Yes Yes
36 OpenManage systems management
iDRAC8 Enterprise
iDRAC9 Enterprise
Full configuration inventory Yes Yes Yes Yes Yes Yes Yes Yes
Inventory export Yes Yes Yes Yes Yes Yes Yes Yes
Remote configuration  Yes Yes Yes Yes Yes Yes Yes Yes
Zerotouch configuration  No No No No No No Yes Yes
System Retire/Repurpose Yes Yes Yes Yes Yes Yes Yes Yes
Server Configuration Profile  in GUI
No Yes No Yes No Yes No
Diagnostics, Service and Logging
Embedded diagnostic tools Yes Yes Yes Yes Yes Yes Yes Yes
Part Replacement No No Yes Yes Yes Yes Yes Yes
Server Configuration Backup No No No No No No Yes Yes
Server Configuration Restore Yes Yes Yes Yes Yes Yes Yes Yes
Easy Restore—system Yes Yes Yes Yes Yes Yes Yes Yes configuration  Easy Restore Auto Timeout No Yes No Yes No Yes No Yes
LED health status indicator No No No No No No No No
LCD screen—iDRAC9 Yes Yes Yes Yes N/A N/A Yes Yes requires optional bezel
Quick Sync—require NFC Yes No Yes No N/A No Yes No bezel
Quick Sync 2.0—requires No Yes No Yes No N/A No Yes BLE/WiFi hardware
iDRAC Direct—front USB Yes Yes Yes Yes Yes Yes Yes Yes mgmt port
iDRAC Service Module (iSM) No Yes No Yes No Yes No Yes embedded
iSM to inband alert No Yes No Yes No Yes No Yes forwarding to consoles
Crash screen capture No No Yes Yes Yes Yes Yes Yes
Crash video capture No No No No No No Yes Yes
Boot capture No No No No No No Yes Yes
Manual reset for iDRAC— Yes Yes Yes Yes Yes Yes Yes Yes LCD ID button
Remote reset for iDRAC— Yes Yes Yes Yes Yes Yes Yes Yes requires iSM
Virtual NMI Yes Yes Yes Yes Yes Yes Yes Yes
OS watchdog Yes Yes Yes Yes Yes Yes Yes Yes
OpenManage systems management 37
iDRAC8 Enterprise
iDRAC9 Enterprise
SupportAssist Report— Yes Yes Yes Yes Yes Yes Yes Yes embedded System Event Log Yes Yes Yes Yes Yes Yes Yes Yes
Lifecycle Log Yes Yes Yes Yes Yes Yes Yes Yes
Enhancedlogginginthe Yes Yes Yes Yes Yes Yes Yes Yes Lifecycle controller log
Work notes Yes Yes Yes Yes Yes Yes Yes Yes
Remote Syslog No No No No No No Yes Yes
License management Yes Yes Yes Yes Yes Yes Yes Yes
Improved customer experience
iDRAC -Faster processor, No Yes No Yes No Yes No Yes more memory
GUI rendered in HTML5 No Yes No Yes No Yes No Yes
Add BIOS configuration to iDRAC GUI
No Yes No Yes No Yes No Yes
iDRACsupportfor SWRAID No Yes No Yes No Yes No Yes licensing
Agent-free management As Dell EMC PowerEdge servers have embedded server lifecycle management, in many cases, there is no need to install an OpenManage systemsmanagementsoftwareagentintotheoperatingsystemof a PowerEdge server. Thisgreatly simplifiesandstreamlinesthe management footprint.
Agent-based management Most systems management solutions require pieces of software, called agents, to be installed on each node in order to be managed within the IT environment. Additionally, the same agent is often used as a local interface into the hardware health and may be accessed remotely as a management interface, typically referred to as a one-to-one interface. For customers that continue to use agent-based solutions, Dell provides OpenManage Server Administrator.
OpenManage consoles The central console in a systems management solution is often referred to as the one-to-many console. The central console provides a rapid view and insight into the overall health of all systems in the IT environment. The Dell EMC systems management portfolio includes several powerful consoles, depending upon your needs, including the following:
• Dell OpenManage Essentials—OpenManage Essentials (OME) is a systems management console that provides a comprehensive view of Dellsystems,devices, andcomponentsinanenterprisenetwork. Itisusedtomonitor Dell PowerEdgeservers, EqualLogicand PowerVaultstorage, and PowerConnect™switches; toupdateandconfigure Dellservers; andtocreateassetreports. OpenManage Essentials also communicates health status alerts for Dell servers, storage, and network devices to the Dell KACE™ K1000 service desk. OpenManage Essentials is available as a no-charge software download from Dell.com/Support. When connected through OME, you can use Dell OpenManage Mobile (OMM) to securely perform a subset of data center monitoring and remediation tasks from a mobile device.
• OpenManage Power Center—Dell’s power management solution, the Dell OpenManage Power Center (OMPC) management console, provides increased visibility to power consumption, anomalies, and utilization through finegrained instrumentation. This enables
38 OpenManage systems management
increased control, improved rack density, faster response times, greater accuracy, and broader decision-making intelligence than would otherwise be possible. When used with a suitably licensed PowerEdge server (with a Dell iDRAC Enterprise license), OMPC leverages Intel Node Manager technology for platform-level power reporting and capping of Intel chipsets. Power Center then communicates with iDRAC to provide node, rack, row or data-center level aggregation of power-management data, as well as execution of control policy — making it easy for IT professionals to identify areas to gain efficiencies and cut wasteful costs.
OpenManage systems management tools, utilities and protocols OpenManage systems management tools and utilities consist of the following:
• Dell EMCRepository Manager: The Dell EMCRepository Manager(RM) isastand-alone GUI-basedproductivitytoolthathelps
simplify the process of managing downloads and baseline BIOS, firmware and driver updates. Repository Manager can create deployment disks as well as create and manage customized repositories.
• Dell EMCUpdate Packages: The Dell EMCUpdate Packages(DUP) isaself-containedexecutableinastandardpackageformatthat updates a software element on a Dell server such as the BIOS, a driver, firmware and other software updates.
• Dell EMC OpenManage Deployment Toolkit: The Dell EMC OpenManage Deployment Toolkit (DTK) is a CLI-based tool that includes a set of utilities for configuring and deploying Dell PowerEdge systems, and can be used to build scripted, unattended OS installations to deploy large numbers of servers in a reliable fashion.
• RACADM: The RACADM command-line utility provides a scriptable interface that allows you to locally or remotely configure iDRAC7. • IPMITool: IPMITool includes scriptable console application programs used to control and manage remote systems using the IPMI version
1.5 and later protocol.
Integration with third-party consoles OpenManage provides integration with several leading third-party consoles, including:
• OpenManage Integration Suite for Microsoft System Center—This suite helps you further streamline, automate and simplify your
most essential IT management tasks. For more information, visit http://www.dell.com/learn/us/en/04/solutions/dcsm-microsoft- system-center.
• OpenManage Integration for VMware vCenter—This plug-in allows IT administrators to monitor, provision, and manage the physical PowerEdge server hardware and firmware from a dedicated menu accessed through the VMware vCenter console using the same role- based access control model as vCenter, combining physical server management. For more information, visit http://www.dell.com/ learn/us/en/04/virtualization/management-plug-in-for-vmware-vcenter.
• BMCSoftware—Dell EMCand BMCSoftwareworktogethertosimplify ITbyensuringtightintegrationbetween Dell EMCserver, storage, and network management functionality and the BMC Software process and data center automation products.
OpenManage connections with third-party consoles OpenManage Connections gives you an easy path to adding support for third-party devices, so you can continue to use your existing management tools while easily adding server systems to your existing IT environment. Integrate new systems at your own pace. Manage new servers and storage with your legacy management tools, while extending the useful life of your existing resources. With OpenManage Connections you can add monitoring and troubleshooting to your IT infrastructure.
• OpenManage Connection for Nagios
• OpenManage Connection for Oracle
• OpenManage Connection for HP
• OpenManage Connection for IBM
• OpenManage Connection for CA
OpenManage systems management 39
Figure 8. Systems management server lifecycle
Table 19. One-to-one and one-to-many operations
Operation One-to-one One-to-many
Update • iDRAC9 with Lifecycle Controller • Repository Manager • DUP • SUU • OpenManage Integration for VMware vCenter
Monitor • iDRAC9 with Lifecycle Controller
• OMSA
• OpenManage Integration for VMware vCenter • OpenManage Integration for BMC BladeLogic • OpenManage Integration for Microsoft System
Center Configuration Manager
Center Configuration Manager
Center Operations Manager
• OpenManage Integration for Microsoft System Center Virtual Machine Manager (SCVMM)
40 OpenManage systems management
For additional detailed information on Dell’s systems management portfolio, visit Dell.com/OpenManage.
Appendix A. Additional specifications  45
12
Appendix A. Additional specifications
Chassis dimensions The following image shows the dimensions of the PowerEdge R940 chassis:
Figure 9. PowerEdge R940 chassis dimension
• Xa: 482.0 mm
• Xb: 434.0 mm
• Zb: 762.2 mm
• Zc: 777.046 mm
Temperature Specifications
Storage –40°C to 65°C (–40°F to 149°F)
Continuous operation (for altitude less than 950 m or 3117 ft)
10°C to 35°C (50°F to 95°F) with no direct sunlight on the equipment.
Maximum temperature gradient (operating and storage) 20°C/h (68°F/h)
42 Appendix A. Additional specifications 
Table 21. Relative humidity specifications
Relative humidity Specifications
Storage 5% to 95% RH with 33°C (91°F) maximum dew point. Atmosphere must be non-condensing at all times.
Operating 10% to 80% relative humidity with 26°C (78.8°F) maximum dew point.
Table 22. Maximum vibration specifications
Maximum vibration Specifications
Operating 0.26 Grms at 5 Hz to 350 Hz (all operation orientations).
Storage 1.87 Grms at 10 Hz to 500 Hz for 15 min (all six sides tested).
Table 23. Maximum shock specifications
Maximum shock Specifications
Operating One shock pulse in the positive z axis of 40 G for 2.3 ms in all operational orientations.
Storage Six consecutively executed shock pulses in the positive and negative x, y, andzaxes(onepulseoneachsideofthesystem) of 71 Gforupto 2 ms.
Table 24. Maximum altitude specifications
Maximum altitude Specifications
Table 25. Operating temperature de-rating specifications
Operating temperature de-rating Specifications
Up to 35°C (95°F) Maximum temperature is reduced by 1°C/300 m (1°F/547 ft) above 950 m (3,117 ft).
35°C to 40°C (95°F to 104°F) Maximum temperature is reduced by 1°C/175 m (1°F/319 ft) above 950 m (3,117 ft).
40°C to 45°C (104°F to 113°F) Maximum temperature is reduced by 1°C/125 m (1°F/228 ft) above 950 m (3,117 ft).
Particulateandgaseouscontamination specifications The following tabledefines the limitations that help avoid any equipment damage or failurefrom particulates and gaseous contamination. If the levels of particulates or gaseous pollution exceed the specified limitations and result in equipment damage or failure, you may need to rectify the environmental conditions. Re-mediation of environmental conditions is the responsibility of the customer.
Appendix A. Additional specifications  43
Table 26. Particulate contamination specifications
Particulate contamination Specifications
Air filtration  Data center air filtration as defined by ISO Class 8 per ISO 14644-1 with a 95% upper confidence limit.
NOTE: This condition applies to data center environments only. Air filtrationrequirementsdo notapplyto ITequipmentdesignedtobe used outside a data center, in environments such as an office or factory floor.
NOTE: Air entering the data center must have MERV11 or MERV13 filtration.
Conductive dust
Corrosive dust
Air must be free of conductive dust, zinc whiskers, or other conductive particles.
NOTE: This condition applies to data center and non-data center environments.
• Air must be free of corrosive dust. • Residual dust present in the air must have a deliquescent point less than
60% relative humidity.
NOTE: This condition applies to data center and non-data center environments.
Table 27. Gaseous contamination specifications
Gaseous contamination Specifications
Copper coupon corrosion rate <300 Å/month per Class G1 as defined by ANSI/ISA71.04-1985.
Silver coupon corrosion rate <200 Å/month as defined by AHSRAE TC9.9.
NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity.
Standard operating temperature
Standard operating temperature Specifications
Continuous operation (for altitude less than 950 m or 3117 ft)
10°C to 35°C (50°F to 95°F) with no direct sunlight on the equipment.
Humidity percentage range 10% to 80% Relative Humidity with 26°C (78.8°F) maximum dew point.
44 Appendix A. Additional specifications 
Expanded operating temperature
Expanded operating temperature Specifications
< 10% of annual operating hours 5°C to 40°C at 5% to 85% RH with 29°C dew point.
NOTE: Outside the standard operating temperature (10°C to 35°C), the system can operate continuously in temperatures as low as 5°C and as high as 40°C.
For temperatures between 35°C and 40°C, de-rate maximum allowable dry bulb temperature by 1°C per 175 m above 950 m (1°F per 319 ft).
< 1% of annual operating hours –5°C to 45°C at 5% to 90% RH with 29°C dew point.
NOTE: Outsidethe standardoperatingtemperature (10°C to 35°C), the system can operate down to –5°C or up to 45°C for a maximum of 1% of its annual operating hours.
For temperatures between 40°C and 45°C, de-rate maximum allowable temperatureby 1°Cper 125 mabove 950 m(1°Fper 228 ft).
NOTE: When operating in the expanded temperature range, system performance may be impacted.
NOTE: Whenoperatingintheexpandedtemperaturerange, ambienttemperaturewarningsmaybereportedonthe LCDpaneland in the System Event Log.
Resolution Refresh rate Horizontal frequency Pixel clock
1024 x 768 60 Hz 48.4 kHz 65.0 MHz
1280 x 800 60 Hz 49.7 kHz 83.5 MHz
1280 x 1024 60 Hz 64.0 kHz 108.0 MHz
1360 x 768 60 Hz 47.71 kHz 85.5 M
1440 x 900 60 Hz 55.9 kHz 106.5 MHz
1600 x 900 60 Hz (RB) 55.54 kHz 97.75 M
1600 x 1200 60 Hz 75.0 kHz 162.0 MHz
1680 x 1050 60 Hz (RB) 64.7 kHz 119.0 MHz
1920 x 1080 60 Hz 67.158 kHz 173.0 MHz
1920 x 1200 60 60 Hz 74.556 kHz 193.25 MHz
*RB-Reduced Blankingfor Digital Displaysrequiringlessblanktime. Thiswasintroducedfor Signal Integrityimprovementsbyreducing Pixel Clock rates for VGA-Analog input devices.
Appendix A. Additional specifications  45
USB peripherals USB peripherals are supported through the front and back USB ports on the R940. The front ports, back and internal ports are USB 3.0 compliant.
46 Appendix B. Standards compliance
13
Standard URL for information and specifications
ACPI Advance Configuration and Power Interface Specification,  v2.0c
acpi.info
HDG Hardware Design Guide Version 3.0 for Microsoft Windows Server
microsoft.com/whdc/system/platform/pcdesign/desguide/ serverdg.mspx
DDR4 Memory DDR4 SDRAM Specification  jedec.org/standards-documents/docs/jesd79-4.pdf
PCI Express PCI Express Base Specification Rev. 2.0 and 3.0 pcisig.com/specifications/pciexpress 
PMBus Power System Management Protocol Specification, v1.2 pmbus.info/specs.html
SAS Serial Attached SCSI, v1.1 t10.org
SATA Serial ATA Rev. 2.6; SATA II, SATA 1.0a Extensions, Rev. 1.2 sata-io.org
SMBIOS System Management BIOS Reference Specification,  v2.7 dmtf.org/standards/smbios
TPM Trusted Platform Module Specification, v1.2 and v2.0 trustedcomputinggroup.org
UEFI Unified Extensible Firmware Interface Specification, v2.1 uefi.org/specifications 
USB Universal Serial Bus Specification, Rev. 2.0 usb.org/developers/docs
Appendix C Additionalresources 47
Resource Description of contents Location
Owner’s Manual This manual, available in PDF format, provides the following information:
• Chassis features • System Setup program • System messages • System codes and indicators • System BIOS • Remove and replace procedures • Troubleshooting • Diagnostics • Jumpers and connectors
Getting Started Guide This guide ships with the system, and is also available in PDF
format. This guide provides the following information:
• Initial setup steps • Key system features • Technical specifications 
Dell.com/Support/Manuals
Dell.com/Support/Manuals
Rack Installation Instructions Thisdocument shipswith therackkits, andprovidesinstructions for installing a server in a rack.
Information Update This document ships with the system, is also available in PDF format online, and provides information on system updates.
System Information Label Thesysteminformationlabeldocumentsthesystemboardlayout andsystemjumpersettings. Textisminimizedduetospace limitationsandtranslationconsiderations. Thelabelsizeis standardized across platforms.
Quick Resource Locator (QRL) This code on the chassis can be scanned by a phone application to access additional information and resources for the server, includingvideos, referencematerials, servicetaginformation, and Dell contact information.
Dell.com/Support/Manuals
Dell.com/Support/Manuals
The Dell online ESSA enables easier and more meaningful estimatestohelpyoudeterminethemostefficientconfiguration  possible. Use ESSA to calculate the power consumption of your hardware, power infrastructure, and storage.
Dell.com/calc
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Server Deployment Services Our Server Deployment Services can maximize the value of your servers quickly using our expert server deployment engineers. With over 10,000 server deployment projects each year, we have experience, best practices, and comprehensive deployment tools to install, configure, and integrate your new solution optimally and correctly. Our deployment experts will assess your environment and understand yourgoals, thendesignandintegrateyourserversolutionforyou.
Table 33. Server deployment capabilities
Server Installation Server Integration
Rack, cable, and label servers Yes
Install image Yes
Test and validate connection Yes Yes
Install operating system Yes
Remote configuration services Yes
Remote Consulting Services Whenyouareinthe final stagesofyour PowerEdgeserverimplementation, youcanrely on Dell Remote Consulting andourcertified  technical experts to help you optimize your configuration with best practices for your software, virtualization, server, storage, networking, and systems management.
Data Migration Service Protect your business and data with our single point of contact to manage your data migration project. Your project manager will work with our experienced team of experts to create a plan using industry-leading tools and proven processes based on global best practices to migrateyourexistingfilesanddata, soyourbusinessgetsupandrunningquicklyandsmoothly.
Appendix D. Support and deployment services 49
ProSupport Plus (for business-critical servers) When you purchase your PowerEdge server, we recommend ProSupport Plus, our proactive and preventative support for your business- critical systems. ProSupport Plus provides you with all the benefits of ProSupport, plus access to a dedicated Technical Account Manager and our elite ProSupport Plus engineers. ProSupport Plus gives you quick and efficient resolutions, working along with our SupportAssist technology that enables us to get ahead of issues in your environment before they become problems.
ProSupport Enterprise Suite With Dell EMC ProSupport Services, we can help you keep your operation running smoothly, so you can focus on running your business. We will help you maintain peak performance and availability of your most essential workloads. Dell EMC ProSupport is a suite of support services that enable you to build the solution that is right for your organization. Choose support models based on how you use technology andwhereyouwanttoallocateresources. Fromthedesktoptothedatacenter,addresseveryday ITchallenges, suchasunplanned downtime, mission-critical needs, data and asset protection, support planning, resource allocation, software application management and more. Optimizeyour ITresourcesbychoosingtherightsupportmodel.
Figure 10. ProSupport Enterprise Suite
ProSupport Our ProSupport service offers highly trained experts around the clock and around the globe to address your IT needs. We will help you minimize disruptions and maximize availability of your PowerEdge server workloads with:
• 24x7x365 access to certified hardware experts
• Collaborative support assistance with over 195 third-party vendors
• Hypervisor and operating system support
• Onsite parts and labor response options including next business day or four-hour mission critical
50 Appendix D. Support and deployment services
ProSupport Flex for Data Center ProSupport Flex for Data Center offers flexible site-wide support for hyperscale data centers with more than 1,000 assets. Built on standard ProSupport components, Flex for Data Center leverages our global scale while being tailored to suit your needs. While not for everyone, it offers a flexible solution for those with large and complex environments. When you choose ProSupport Flex for Data Center, you will get:
• Enterprise-wide support that covers your entire data center. • A dedicated Technical Account Manager with remote, on-site, part-time and full-time options. • Dedicated elite ProSupport Flex technical and field engineers who are trained on your environment and configurations.  • Flexibleon-sitesupportandpartsoptionsthatfityouroperationalmodel • A tailored support plan for your operations staff. 
 
Additional professional services
Dell Education Services Dell Education Services offers the PowerEdge server training courses designed to help you achieve more with your hardware investment. The curriculum is designed in conjunction with the server development team, as well as Dell’s technical support team, to ensure that the training delivers the information and practical, hands-on skills you and your team need to confidently manage and maintain your Dell server solution. Tolearn moreor registerforaclasstoday, visit LearnDell.com/Server.
Dell Global Infrastructure Consulting Services Dell Global Infrastructure Consulting Services useskilledsolutionarchitects, innovativetools, automatedanalysisand Dell’s intellectual property to give you rapid insight into the root causes of unnecessary complexity. Weseek better answers than traditional service models,
Appendix D. Support and deployment services 49
and our strategy is to help you quickly identify high-impact, short-duration projects that deliver return on investment (ROI) and free up resources. The results are practical, action-oriented plans with specific, predictable, measurable outcomes. From data center optimization to server virtualization to systems management, our consulting services can help you build a more efficient enterprise.
Dell managed services Dell Managed Services are a modular set of lifecycle services designed to help you automate and centrally configure, deploy, and manage your day-to-day data center operations. These services extend your existing on-premise IT infrastructure with offpremise cloud services designed to better address challenges with mobility, highly distributed organizations, security, compliance, business continuity, and disaster preparedness.
48 Appendix D. Support and deployment services
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